[FFmpeg-devel] [PATCH v2] lavfi: add nlmeans CUDA filter

[Dylan Fernando]

On Sun, Sep 5, 2021 at 8:37 AM Timo Rothenpieler <timo at rothenpieler.org>
wrote:

> On 05.09.2021 20:02, Dylan Fernando wrote:
> >
> > Impossible to convert between the formats supported by the filter 'graph
> 0
> > input from stream 0:0' and the filter 'auto_scale_0'
> >
> > Thread 1 "ffmpeg" received signal SIGSEGV, Segmentation fault.
> > 0x00005555556726eb in uninit (ctx=0x55555817e800) at
> > libavfilter/vf_nlmeans_cuda.c:704
> > 704         CudaFunctions *cu = s->hwctx->internal->cuda_dl;
>
> Seems like some error state can cause uninit to be called before the
> hwctx is properly set up.
> So it needs a guard against that case.
>
> > (gdb) backtrace
> > #0  0x00005555556726eb in uninit (ctx=0x55555817e800) at
> > libavfilter/vf_nlmeans_cuda.c:704
> > #1  0x0000555555742e65 in avfilter_free (filter=0x55555817e800) at
> > libavfilter/avfilter.c:769
> > #2  0x0000555555744cac in avfilter_graph_free (graph=0x55555716ded0) at
> > libavfilter/avfiltergraph.c:126
> > #3  0x0000555555707ae0 in cleanup_filtergraph (fg=0x55555716dec0) at
> > fftools/ffmpeg_filter.c:952
> > #4  configure_filtergraph (fg=fg at entry=0x55555716dec0) at
> > fftools/ffmpeg_filter.c:1130
> > #5  0x000055555571b060 in ifilter_send_frame (frame=0x555557a72d00,
> > ifilter=0x55555716db40) at fftools/ffmpeg.c:2242
> > #6  send_frame_to_filters (ist=ist at entry=0x55555716c5c0,
> > decoded_frame=decoded_frame at entry=0x555557a72d00) at
> fftools/ffmpeg.c:2323
> > #7  0x000055555571c204 in decode_video (decode_failed=<optimized out>,
> > eof=<optimized out>, duration_pts=<optimized out>, got_output=<optimized
> > out>, pkt=<optimized out>, ist=<optimized out>)
> >      at fftools/ffmpeg.c:2520
> > #8  process_input_packet (ist=ist at entry=0x55555716c5c0,
> pkt=0x55555716c7c0,
> > no_eof=no_eof at entry=0) at fftools/ffmpeg.c:2682
> > #9  0x000055555571daee in process_input (file_index=<optimized out>) at
> > fftools/ffmpeg.c:4636
> > #10 transcode_step () at fftools/ffmpeg.c:4776
> > #11 transcode () at fftools/ffmpeg.c:4830
> > #12 0x00005555556f84a7 in main (argc=<optimized out>, argv=<optimized
> out>)
> > at fftools/ffmpeg.c:5035
>
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>
> attatched updated patch
>
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